APA citiranje

Bertsch, M., & Kamin, S. A positivity property of solutions of a degenerate parabolic equation with nonconstant coefficients.

Trích dẫn kiểu Chicago

Bertsch, M., và S. Kamin. A Positivity Property of Solutions of a Degenerate Parabolic Equation With Nonconstant Coefficients.

MLA citiranje

Bertsch, M., và S. Kamin. A Positivity Property of Solutions of a Degenerate Parabolic Equation With Nonconstant Coefficients.